$ git clone -n https://src.fedoraproject.org/rpms/R-withr.git /var/lib/mock/f40-build-2288947-55824/root/chroot_tmpdir/scmroot/R-withr
Cloning into '/var/lib/mock/f40-build-2288947-55824/root/chroot_tmpdir/scmroot/R-withr'...
$ git fetch origin 9fecfb1535b84e6e8c01ccc45340c69bc286406b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-withr
 * [new ref]         9fecfb1535b84e6e8c01ccc45340c69bc286406b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9fecfb1 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild